Elevating tool



3 Sheets-Sheet 1 l rl 49 INVENTOIZ. ll/vcouv Flam/v6 Aug. 17 ,1926.

L. FIELDING ELEVATI NG TOOL Filed Sept. 28, 1925 3 Sheets-Shoat 2 a lnvcnfoz ZINCOL/V 1 Fun owe Aug. 17, 1926. 1,596,343

L. FIELDING ELEVATING TOOL Filed Sept. 28, 1925 3'Sheets-Sheet s atto zmq Patented Aug. 17, 1926.

STATES EATENT OFFICE.

LINCOLN rIELDIitG, F OXNARD, CALIFORNIA.

ELEVATING TOOL.

Application filed. September 23, 1925. Serial No. 59,173.

lvly invention relates to tools used in elevation of various devices for the releasably connecting the elevating means to the device during elevation, and particularly, not necessarily, tools for elevating suc rods as used in well drilling.

although her It is a purpose ofmy invention'to provi e an elevating tool having the desirable qu alities of structural simplicity and durability,

and one which is capable of being securely locked in gripping position to provide and maintain an operative connection lo'etw the sucker rod and the elevati means to dental release of the latter. Further,

permit lifting of a sucker ro'd section with out the liability "of disconnection or acclinvention provides a tool having jaws movable to occupy gripp ng and non-gripping positions, and means operable to move aws manner to maintain the ping position so that afterthe release or" sucker rod the tool can be lowered with the to either of shch positions and in a aws 1n non-gripthe the jaws ready to receive another sucker rod section.

I willdescrihe only two forms of elevating tool embodying my inventionand will point out the novel features thereof claims.

In the drawings 'Fignr'el is a View showing in front elevat on and partly in rating tool embodying my invention,

the jaws thereof in Figure 2 is a vertical tool shown in Figure 1-, with sectional view of section one form of ele- :Wltll non-gripping position;

the

the tool applied to a sucker rod section and the jaws thereof in gripping position;

Figure taken on the line 33 of Figure 1;

3 is a horizontal sectional view Figure 4 is a view similar to Figure 3,

with the jaws in grippingposition withspect to a sucker rod section;

Figure 5 is a view showing elevation, with the connecting yoke omitt Figures 6 and 7 views taken on the line and showing the two extre'me positi which :one of the cams embodied in the 'tool' is capable of occupying;

Figure 8 is ve'r on the necting yoke omitted the tool in end' are vertical sectional 6+6 of Figure 1,

one

tic'al sectional View taken line 8'8 of Figure '1 with the-con- Figure 9 is a fragmental view, showing a modified form of gripping aws embodying my invention.

Similar reference characters refer to similar parts in each of the severalvie ws.

Referring specifically to the drawings, my

invention in its present embodiment 'com prises a frame including a base 15having a curved rear edge and a straight vfront edge and a recess 16 medially of its ends extending inwardlyfroin the front edge and in which the article to i is adapted to be received. At theinner end of the recess the base'is formed with a relabe gripped and elevated tively long ear 17 provided with sp'aeeol openings through which headed pins 18 are adapted to extend, while in advance of the jaws 20 are provided with integral-armsQT circular in cross section and curved downwardly fro'mtheir points of connection with the jaws. These arm's serve pivots for a yoke 22 connected to the elevating means (not shown). This yoke 22 is provided at its end with a pair of eyes 23 through which the arms 21 extend so that theyoke is pivotally supported on the arms to swing about a horizontal axis. The freeends of the arms 21 extend into eccentric openings 24 inthe disk-shaped cams 25, the latter being'rotatably mounted in'heads 26 =fO1H1l3Cl OI] the ends of the base 15 and constituting a of the tool frame. formed with V-sha-ped :grooves 27 which slidably receive the beveled edges of the cams 25 so that the cams arerotata'bly mounted in the heads.

5, are formed with vertically extending forward ends. Between the ear As clearly illustrated in .l3i-g ;m:e 2, the

bywhich latter the tool as a unit is I part These heads are.

The heads, as shown in Figure slots 28 in which work the free ends of the arms 21 as the jaws are moved to gripping or nongripping position. The cams are operatively connected to each other through the medium of a yoke 29 constructed to provide a handle which is adapted to be gripped and actuated to simultaneously rotate the two cams within the heads.

In the operation of the tool the jaws 20 can be moved from gripping to non-gripping position by rotation of the cams 25 so as to move the openings 2% from the elevated position shown in Figure 2 to the lowered, position shown in Figure 1, whereby the arms 21 are forced downwardly, thereby swinging the jaws outwardly about their pivots to the non-gripping position. The position of either cam when the jaws are in non-gripping position is'clearly shown. in Figure 6, wherein it will be noted that the yoke 29 is elevated. During the rotation of the cams to lower the arms 21 the arms are held against any lateral movement by virtue of the walls of the slots 28 of the heads 26, and through the eccentric relation of the arms with respect to the cams it will be clear that rotation of the cams in the proper direction will compel downward movement of the arms to assure the movement of the jaws to non-gripping position.

In the non-gripping position of the jaws they are sufficiently spaced to allow the insertion of a sucker rod section or other article therebetween, and with the tool in applied position to a sucker rod section, it will be clear that the section can be effectively gripped by moving the jaws to gripping position. The movement of the jaws to gripping position is efl'ected in the following manner: The handle 29 is moved downwardly from the position shown in Figure 6 to that shown in Figure 7, thereby rotating the cams 25 in the opposite direction to that previously described, thereby elevating the arms 21 within the slots 28 and thus causing an inward swinging movement of the jaws toward each other until in gripping relation to the sucker rod section. By reference to Figure 7, in which is shown the final position of either cam when the jaws are in gripping position, it will be noted that the center of the cam is in vertical alinement with the end of the corresponding arms 21. This may be termed a dead center position, and it will be manifest that with the cam in such position the cam as well as the arm is locked against accidental movement so that it may be said that the jaws 20 are thus locked in gripping position. It will of course be understood that the cams are still capable of being manually rotated in the opposite direction to effect the movement of the jaws to non-gripping position, and any force exerted upon the arms through the jaws will be ineffective to actuate the cams and thus permit the accidental release of the sucker rod. It will thus be manifest that when the jaws are once moved to gripping position they are locked against accidental release so that the sucker rod or other article gripped by the tool can be elevated with safety.

Referring now to Figure 9, I have herein shown another form of elevating tool which is identical with the first form, with the exception that the faces of the jaws 20 are formed with angular recesses 2O .iaving serrated surfaces similar to the jaws of a wrench. In this adaptation of my invention the tool can be used as a wrench in that the jaws when in gripping position with respect to the sucker rod or other article will operate to effectively hold the rod against rotation within the tool. With the sucker rod held against rotation it will be clear that by the application of a wrench to the next adjacent section, the second section can be disconnected from the first section to permit the elevation of the first section through use of the tool.

Although I have herein shown and described only two forms of elevating tool embodying my invention, it is to be understood that various changes and modifications may be made therein without departing-from the spirit of the invention and the spirit and scope of the appended claims.

I claim:

1. An elevating tool of the character de scribed comprising a frame, a pair of jaws pivoted on the frame to occupy gripping position and non-gripping position, arms on the jaws, and cams eccentrically mounted on the arms and rotatable in the frame to actuate the a ms whereby the jaws are moved to gripping or non-gripping position.

2. An elevating tool as embodied in claim 1, wherein the arms are restricted to vertical movement and the cams are mounted so that when the jaws are in gripping position the centers of the cams are beneath and in vertical alinement with the arms, whereby the cams and arms are locked against accidental movement and the jaws locked in gripping position.

3. An elevating tool of the character described comprising a frame, a pair of jaws pivoted on the frame to occupy gripping and non-gripping positions. arms on the jaws, cams associated with the arms and rotatable in one direction in the frame to actuate the arms and thus move the jaws to gripping position and rotatable in another direction to actuate the arms and thus move the jaws to non-gripping position, and means by which the cams can be simultaneously rotated in one direction or the other.

4. An elevating tool as embodied in claim 3, wherein said means comprises a yoke rigidly connecting the cams.

5. An elevating tool of the character described comprising a frame, a pair of jaws pivoted on the frame to occupy gripping and non-gripping positions, arms fixed to the jaws, a yoke pivoted on the arms, and cams associated with'the arms and movable in the frame to actuate the arms whereby the jaws are moved to gripping or nongripping position.

6. An elevating tool of the character described comprising a frame, a pair of jaws pivoted on the frame to occupy gripping and non-gripping positions, arms fixed to the jaws, heads on the frame slotted to receive the arms, and cams eccentrically mounted on the arms and rotatable in the heads to actuate the arms whereby the jaws are moved to gripping or non-gripping position.

7. An elevating tool as embodied in claim 6, wherein a yoke rigidly connects the cams to permit simultaneous rotation of the cams in either direction.

8. An elevating tool of the character described comprising a pair of jaws pivoted to occupy gripping and non-gripping positions, arms fixed to the jaws, means for securing the arms against lateral movement, and cams associated with the arms so that when actuated the jaws will bemoved to gripping and non-gripping position.

LINCOLN FIELDING. 

